Knights & Queens - Four chess games bundle. The first is "Knight's Tour", simply move the knight (in legal knight chess moves) to every square on the board in as few moves as possible.

The second is "Eight Queens", place eight queens on the board so that no queen is threatening another queen.
The third is "Five Queens", place five queens on the board so that every square can be reached by a queen.
The fourth is "5 Knights & Queens", place five queens and five knights on the board so that no figure threatens another figure and that every square can be reached by a figure, tap once for a queen and twice for a knight.